The light grew brighter as they advanced, until finally they perceived a magnificent archway just ahead of them.  Aquareine hesitated a moment whether to go on or turn back, but there was no escaping the sea devils behind them, and she decided the best way out of their difficulties was to bravely face the unknown Zog and rely upon her fairy powers to prevent his doing any mischief to herself or her friends.  So she led the way, and together they approached the archway and passed through it.

They now found themselves in a vast cavern, so great in extent that the dome overhead looked like the sky when seen from earth.  In the center of this immense sea cavern rose the towers of a splendid castle, all built of coral inlaid with silver and having windows of clear glass.

Surrounding the castle were beds of beautiful sea flowers, many being in full bloom, and these were laid out with great care in artistic designs.  Goldfish and silverfish darted here and there among the foliage, and the whole scene was so pretty and peaceful that Trot began to doubt there was any danger lurking in such a lovely place.

As they approached to look around them, a brilliantly colored gregfish approached and gazed at them curiously with his big, saucer-like eyes.  “So Zog has got you at last!” he said in a pitying tone.  “How foolish you were to swim into that part of the sea where he is powerful.”

“The sea devils made us,” explained Clia.

“Well, I’m sorry for you, I’m sure,” remarked the Greg, and with a flash of his tail, he disappeared among the sea foliage.

“Let us go to the castle,” said the Queen in a determined voice.  “We may as well boldly defy our fate as to wait until Zog seeks us out.”

So they swam to the entrance of the castle.  The doors stood wide open, and the interior seemed as well lighted as the cavern itself, although none of them could discover from whence the light came.

At each side of the entrance lay a fish such as they had never seen before.  It was flat as a doormat and seemed to cling fast to the coral floor.  Upon its back were quills like those of a porcupine, all pointed and sharp.  From the center of the fish arose a head shaped like a round ball, with a circle of piercing, bead-like eyes set in it.  These strange guardians of the entrance might be able to tell what their numerous eyes saw, yet they remained silent and watchful.  Even Aquareine gazed upon them curiously, and she gave a little shudder as she did so.

Inside the entrance was a domed hall with a flight of stairs leading to an upper balcony.  Around the hall were several doorways hung with curtains made of woven seaweeds.  Chairs and benches stood against the wall, and these astonished the visitors because neither stairs nor chairs seemed useful in a kingdom where every living thing was supposed to swim and have a fish’s tail.  In Queen Aquareine’s palaces benches for reclining were used, and stairs were wholly unnecessary, but in the Palace of Zog the furniture and fittings were much like those of a house upon earth, and except that every space here was filled with water instead of air, Trot and Cap’n Bill might have imagined themselves in a handsome earthly castle.